Magnetic characterization of microscopic particles by MO-SNOM
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Updated: Aug 18, 2026
Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
Published on: June 9, 2016
J Schoenmaker1, M S Lancarotte, A C Seabra
1Instituto de Física da Universidade de São Paulo, CP 66318, ZIP 05315-970, São Paulo, Brazil. jeroen@macbeth.if.usp.br
Abstract:
This paper reports on the development of a magneto-optical scanning near-field optical microscope and the experimental near-field study of the domain structure for a model magnetic particle of 16 x 16 micro m(2) of a Co(70.4)Fe(4.6)Si(15)B(10) amorphous thin film, deposited on a silicon substrate. We present the topographic, optical and magneto-optical differential susceptibility (MODS) images of the particle. Imaging by using the local MODS reveals the domain structure. These images are also used for positioning the tip in order to acquire local hysteresis loops, with submicrometre spatial resolution.
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